Describe the characteristics of RISC and CIBC processor

In this section we introduce the major characteristics of RISC and CISC processor. The characteristics of them are given below:

RISC characteristics: The concept of RISC architecture involves an attempt to reduce execution time by simplifying the instruction set of the computer.

The major characteristics of a RISC processor are:

(i) RISC machines require lesser time for its design implementation.

(ii) RISC processor consumes less power and clock cycle.

(iii) RISC instructions are executed in single clock cycle, which most of CISC requires more than one clock cycle.

(iv) RISC system are more popular.

(v) The current technology RISC processors support the floating point data type.

(vi) RISC machines mostly uses hardwired control unit.

CISC characteristics: The instructions in a typical CISC processor provide direct manipulation of operands residing in memory. In summary the major characteristics of CISC processor are-

(i) A large member of instructions typically from 100 to 250 instruction.

(ii) Some instructions that perform specialized tasks and are used in frequently.

(iii) A large variety of addressing modes typically from 5 to 20 different modes.

(iv) Variable length instruction formats.

(v) Instruction that manipulate operands in memory.